Tran, Lam, Hieu Le, Vinh Tran, and Van Tran. “Influence of SnO2 Concentration on the Structure and Optical Properties of Erbium Doped SiO2-SnO2 Ceramic Glass Thinfilms”. Science and Technology Development Journal 17, no. 3 (September 30, 2014): 92-97. Accessed July 22, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1374.